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//===-- BPFCallLowering.cpp - Call lowering for GlobalISel ------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
///
/// \file
/// This file implements the lowering of LLVM calls to machine code calls for
/// GlobalISel.
///
//===----------------------------------------------------------------------===//
#include "BPFCallLowering.h"
#include "llvm/CodeGen/GlobalISel/MachineIRBuilder.h"
#define DEBUG_TYPE "bpf-call-lowering"
using namespace llvm;
BPFCallLowering::BPFCallLowering(const BPFTargetLowering &TLI)
: CallLowering(&TLI) {}
bool BPFCallLowering::lowerReturn(MachineIRBuilder &MIRBuilder,
const Value *Val, ArrayRef<Register> VRegs,
FunctionLoweringInfo &FLI,
Register SwiftErrorVReg) const {
if (!VRegs.empty())
return false;
MIRBuilder.buildInstr(BPF::RET);
return true;
}
bool BPFCallLowering::lowerFormalArguments(MachineIRBuilder &MIRBuilder,
const Function &F,
ArrayRef<ArrayRef<Register>> VRegs,
FunctionLoweringInfo &FLI) const {
return VRegs.empty();
}
bool BPFCallLowering::lowerCall(MachineIRBuilder &MIRBuilder,
CallLoweringInfo &Info) const {
return false;
}
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